a list compiled by Alex Kasman (College of Charleston)
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Mathematician Alan Turing appears as a primary character in this unusual Doctor Who novel, and narrates the first third of it. (The other two thirds are narrated by authors Graham Greene and Joseph Heller respectively!)
Turing, Greene, Heller, and the Doctor get caught up in a conflict between three nonhumans sending some mysterious signals from Dresden (where they are posing as Nazis) and two who are hunting them down (one of them posing as a high ranking British officer and the other playing the role of the femme fatale). The facts that the book is told from the perspective of three real historical figures of the 20th century, that the Doctor himself only appears occasionally, that it somewhat explicitly describes horrific deaths and lustful sex, and that moral relativism is the predominant theme are why I have described this as an unusual Doctor Who book. It is certainly unlike any of the two dozen or so other books about the Gallifreyan TimeLord that I've read. (Perhaps these features are more common in the Eighth Doctor Adventures; this is the only book I've read from among those.) I am impressed with the author's attempt to imitate the different styles of the three narrators, even if each has been reduced to a caricature. Turing is portrayed as being earnest, rational (to a fault), naive, childlike, and madly in love with the Doctor. Greene, who is portrayed here during his time working for Kim Philby, is much more jaded and obsessed with religion. The tone switches to a madcap comedy when Heller takes over the narration, but somehow it all fits together into a whole that has a surprising philosophical depth for a Doctor Who novel. Let me say a bit about the ways that math arises in the book: In the first part which is narrated by Turing, math arises frequently as a practical matter in his discussion of his daily activities or in metaphors. For example:
On page 18, Turing tests the Doctor by saying "There's a problem with Hilbert's theory of groups that has always troubled me." Turing is suitably impressed by the Doctor's answer. (Was this intended to be a reference to Hilbert's Fifth Problem? Other than that, I don't really associate David Hilbert with group theory.) Page 29 begins with an analogy between the trust on which friendships depend and the axioms that underlie mathematical theories which then morphs into a brief discussion of Turing's work on computable numbers. A longer discussion of computable numbers appears on page 53. It's actually a pretty nice description of the math whose only real fault is that it exaggerates the importance of the result by failing to mention GĂ¶del's closely related work which preceded it. Math becomes especially important to the plot in the third portion narrated by Heller when Turing explains how the Doctor's plan relies on the mathematical nature of reality itself:
Finally, although I don't really consider this to be mathematical, Turing is inspired by his encounter with the Doctor and the other aliens to devise a test involving someone trying to decide whether something is "human", thereby justifying the title. Note: It was Vijay Fafat who told me about this work of mathematical fiction way back in 2012. However, his email message arrived at an unfortunate time and was misplaced. I only rediscovered that message in 2021 and am working my way through the many suggestions it contained. I am very grateful to Vijay for the suggestion and also very sorry that it has taken me so long to act upon it. 
More information about this work can be found at www.amazon.com. 
(Note: This is just one work of mathematical fiction from the list. To see the entire list or to see more works of mathematical fiction, return to the Homepage.) 

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Exciting News: The 1,600th entry was recently added to this database of mathematical fiction! Also, for those of you interested in nonfictional math books let me (shamelessly) plug the recent release of the second edition of my soliton theory textbook.
(Maintained by Alex Kasman, College of Charleston)